220D start problem - Page 3 - Mercedes-Benz Forum

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post #21 of 33 (permalink) Old 04-17-2015, 12:18 PM
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Adjust the valves first, though
Actually I would check compression before and after, that way you know if it had an effect on the situation. This is to resolve a starting issue isn't it? It seems that was what the thread was about.
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post #22 of 33 (permalink) Old 04-17-2015, 12:24 PM
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You can kill two birds with one stone if you are set on replacing the glow plugs. There is an adapter which fits into the glow plug socket. After you pull the plugs you can check the compression readings.

You must use a compression gauge made for diesel engines. The pressure developed in a good diesel engine will blow the face right off one of the "girly" gauges made for gasoline engines.
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post #23 of 33 (permalink) Old 04-17-2015, 12:52 PM
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You can kill two birds with one stone if you are set on replacing the glow plugs. There is an adapter which fits into the glow plug socket. After you pull the plugs you can check the compression readings.

You must use a compression gauge made for diesel engines. The pressure developed in a good diesel engine will blow the face right off one of the "girly" gauges made for gasoline engines.
I always used the AutoMeter recording meter. Stapled the card to the repair order when finished, removes all speculation if something is out of order. When doing a job like this I as well pulled the injectors and tested their pressures and patterns and corrected what was off. If all was in order with the nozzles I did the pump timing so i knew how things were going to work out. I ran a dyno for many years and basically did performance issues.
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post #24 of 33 (permalink) Old 04-17-2015, 01:00 PM
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yeah, I have one of those:

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post #25 of 33 (permalink) Old 04-18-2015, 07:13 AM Thread Starter
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Yo Zeitgeist, and everyone else with advice for this newbie. Many thanks for the wise council.
Here's the skinny on the 220D start problem. I'm the idiot. My only MB experience prior to this 220D was a brief ownership of a 83 240D awhile back. All the glow plug stuff was handled by the car itself. "Gorilla knob" and manually HOLDING IT WITH PRESSURE AGAINST AN INVISIBLE STARTER SPRING while the glow plugs get hot was not in my little brain. After a couple of painful failures trying to start this old soldier without any heated glow plugs. I finally got an explanation from the previous owner (who thought I would naturally know this stuff) guess what - it started in 30+ degree temp on the first pull, no smoke !!! Almost as good as sex. And by the way, compression is over 300 on all. I am thinking though of going to the pencil type lugs at some point.
I am sure glas you EXPERTS are around for people like me.
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post #26 of 33 (permalink) Old 04-18-2015, 07:42 AM
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DOH, if all else fails, read the instructions!
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post #27 of 33 (permalink) Old 04-18-2015, 10:05 AM
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Getting old sucks.
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post #28 of 33 (permalink) Old 04-19-2015, 06:27 AM
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Getting old sucks.
Beats the alternative.
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post #29 of 33 (permalink) Old 04-19-2015, 12:44 PM
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Still sucks.
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post #30 of 33 (permalink) Old 04-20-2015, 07:17 PM
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first thing a valve adjustment . a older worn engine will be hard starting when cold .
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